The controlling Illinois Statute is 625 ILCS 5/11‑1414(a) which provides:
“The driver of a vehicle shall stop such vehicle before meeting or overtaking, from either direction, any school bus stopped at any location for the purpose of receiving or discharging pupils. Such stop is required before reaching the school bus when there is in operation on the school bus the visual signals as specified in Sections 12‑803 and 12‑805 of this Code. The driver of the vehicle shall not proceed until the school bus resumes motion or the driver of the vehicle is signaled by the school bus driver to proceed or the visual signals are no longer actuated.”
If you receive a conviction (different than court supervision) for Improper Passing of a School Bus your license will be suspended by the Illinois Secretary of State for three months. On your second conviction, your license will be suspended for one year.